JP · JPN

Japan phone number format

Full synthetic number for UI, QA, and parser tests. It is deliberately invalid and cannot be used for real communication.

Calling code

Invalid test number

+81 185 296 307 418 529 630

For UI and QA tests only: cannot be used for communication or pass phone-number validity checks.

Example international grouping+81 XX XXXX XXXX

This masked mobile example shows one possible grouping. Other number types and prefixes may differ; the invalid test number above is separate QA data.

Possible lengths (digits): 8, 9, 10, 11, 12, 13, 14, 15, 16, 17. Possible national-number lengths across number types in the bundled phone metadata. The invalid test number exceeds the longest listed length.

Data provenance

Sources

ITU-T E.164
Google libphonenumber metadata

Data snapshot: 2026-09-21